Coffee machine



FIG. 1 is a front perspective view of a coffee machine showing my new design;

FIG. 2 is a rear perspective view of the design of FIG. 1;

FIG. 3 is a front view of the design of FIG. 1;

FIG. 4 is a rear view of the design of FIG. 1;

FIG. 5 is a left view of the design of FIG. 1;

FIG. 6 is a right view of the design of FIG. 1;

FIG. 7 is a bottom view of the design of FIG. 1; and,

FIG. 8 is a top view of the design of FIG. 1.

The broken lines in the drawing depict portions of the coffee machine that form no part of the claimed design. 

CLAIM The ornamental design for a coffee machine, as shown and described. 